To find out the Linux help in operating system,first you need to know about manual pages.
Manual Pages
Applications, utilities, and shell prompt commands usually have corresponding manual pages, these pages are also called as "man" pages.These "man" pages are nothing but "Linux Help".These "man" pages shows the reader available options and values of file or executable.
Man Pages are structured in such a way that users can quickly view the page for information, which is important when dealing with commands.Using man
Man Pages can be accessed via shell prompt by typing the command man with following executable command.
eg: man ls
Reading a Man Page with the Shell Prompt
To navigate the man page you can use the "arrow" keys or use the [Spacebar] to move down one page and [B] to move up. To exit the man page, type [Q].
To search a man page for keywords type [/] and then a keyword or phrase and press [Enter]. All instances of the keyword will be highlighted throughout the man page, allowing you to quickly read the keyword in context.
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